Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

27,404 Article Results

Simulation and Implementation of Quasi-Z-Source Based Single-stage Buck/boost Inverter Fed Induction Motor

10.11591/ijpeds.v7.i3.pp908-914
P. Shunmugakani , D. Kirubakaran
Renewable power systems as distributed generation units often experience big changes in the inverter input voltage due to fluctuations of energy resources. Z-source inverter (ZSI) is known as a single-stage buck/boost inverter. The ZSI achieves voltage buck/boost in single stage, without additional switches. Triggering on state enables energy to be stored in inductors, which is released when at non-shoot-through state, followed by the voltage boost feature. The voltage-fed Z-source inverter/quasi-Z-source inverter (QZSI) has been presented suitable for photovoltaic (PV) applications mainly because of its single-stage buck and boost capability and the improved reliability.
Volume: 7
Issue: 3
Page: 908-914
Publish at: 2016-09-01

Modelling, Impedance Design, and Efficiency Analysis of Battery Assists PV tied Quasi-Z source inverter

10.11591/ijpeds.v7.i3.pp816-825
T.K.S Sathayanarayanan , M Ramasamy , C Bharatiraja , JL Munda
The photovoltaic (PV) power cohort becoming more and more attractive in modern power systems era to meet out the power demand in the globe. Consequently, the extraction of maximum power and reduced power electronics stuff for PV based power generation system research studies are growing continuously to meet out the large power-scale/high-voltage grid-tie demands. In this junction, to improve the efficiency of the existing PV tied Quasi-Z source inverter (QZSI), in this paper the new attempt has proposed here by connecting two batteries across to the QZ capacitors. When a battery connected across each capacitor, this system can deliver power to the load power when the PV panel outputs a variable power with fluctuations. The battery can be charged or discharged without any extra circuit, because of the unique impedance network of QZSI. New PWM techniques and principles are proposed to control the new energy stored QZSI when applied to the PV power system. They can control the inverter output power and manage the battery power simultaneously. The operating principle and power flow of this system are analysed. The Simulated and experimental results through using the planned 0.2-kW prototype validate the proposed analytic model and the design method. In addition, this paper analyzes all of the functioning states for a QZSI and calculates the power loss.
Volume: 7
Issue: 3
Page: 816-825
Publish at: 2016-09-01

Dimensionality Reduction and Classification of Hyperspectral Images using Genetic Algorithm

10.11591/ijeecs.v3.i3.pp503-511
R. Kiran Kumar , B. Saichandana , K. Srinivas
This paper presents genetic algorithm based band selection and classification on hyperspectral image data set. Hyperspectral remote sensors collect image data for a large number of narrow, adjacent spectral bands. Every pixel in hyperspectral image involves a continuous spectrum that is used to classify the objects with great detail and precision. In this paper, first filtering based on 2-D Empirical mode decomposition method is used to remove any noisy components in each band of the hyperspectral data. After filtering, band selection is done using genetic algorithm in-order to remove bands that convey less information. This dimensionality reduction minimizes many requirements such as storage space, computational load, communication bandwidth etc which is imposed on the unsupervised classification algorithms. Next image fusion is performed on the selected hyperspectral bands to selectively merge the maximum possible features from the selected images to form a single image. This fused image is classified using genetic algorithm. Three different indices, such as K-means Index (KMI) and Jm measure are used as objective functions. This method increases classification accuracy and performance of hyperspectral image than without dimensionality reduction.
Volume: 3
Issue: 3
Page: 503-511
Publish at: 2016-09-01

BPSK Modulation and Demodulation with Power Line Carrier Communication and GSM Communication for Smart Metering

10.11591/ijpeds.v7.i3.pp713-722
B V Rajanna , SVNL Lalitha , Ganta Joga Rao , S K Shrivastava
GSM/GPRS and PLC communication are used for Automatic Meter Reading (AMR) applications. These AMR systems have made substantial progress over the recent years in terms of functionality, scalability, performance and openness such that they can perform remote metering applications for very demanding and complex systems. By using BPSK (Binary Phase Shift Keying) modulation with Power Line Carrier Communication, Smart Metering can be done in Rural Smart Micro-grids. The design and Simulation of BPSK Modulation and Demodulation are successfully done by using MATLAB/Simulink software. The advantages of using BPSK modulation over the QPSK modulation and the advantages of PLC Communication over the GSM Communication is identified in this paper.
Volume: 7
Issue: 3
Page: 713-722
Publish at: 2016-09-01

An Experimental Study of P&O MPPT Control for Photovoltaic Systems

10.11591/ijpeds.v7.i3.pp954-963
Badreddine Lahfaoui , Smail Zouggar , Mohamed Larbi Elhafyani , Mohammed Seddik
Tracking the maximum power point plays an important role for the optimization of the solar energy. The objective here is to study experimentally optimizing photovoltaic (PV) systems connected to a DC-DC converter (Boost) and a resistive load. For this, tests were conducted to determine the law of open loop control (power versus the duty cycle) for different solar irradiance values and load with an approximately constant cell temperature. The obtained results showed that the power passes through a maximum point. In order to extract the maximum power, for different values of solar irradiance and load, an MPPT control "Perturb and Observe" P & O has been implemented on a DSPACE 1104. The experimental results showed the performance of the method suggested.
Volume: 7
Issue: 3
Page: 954-963
Publish at: 2016-09-01

T-S Fuzzy Observer and Controller of Doubly-Fed Induction Generator

10.11591/ijpeds.v7.i3.pp617-624
Fouad Abdelmalki , Najat Ouaaline
This paper aims to ensure a stability and observability of doubly fed induction generator DFIG of a wind turbine based on the approach of fuzzy control type T-S PDC (Parallel Distributed Compensation) which determines the control laws by return state and fuzzy observers. First, the fuzzy TS model is used to precisely represent a nonlinear model of DFIG proposed and adopted in this work. Then, the stability analysis is based on the quadratic Lyapunov function to determine the gains that ensure the stability conditions. The fuzzy observer of DFIG is built to estimate non-measurable state vectors and the estimated states converging to the actual statements. The gains of observatory and of stability are obtained by solving a set of linear matrix inequality (LMI). Finally, numerical simulations are performed to verify the theoretical results and demonstrate satisfactory performance.
Volume: 7
Issue: 3
Page: 617-624
Publish at: 2016-09-01

A Review Work on High Frequency Induction Curing of Porous Asphalt Concrete

10.11591/ijpeds.v7.i3.pp872-879
Kaushik Neogi , Pradip Kumar Sadhu , Atanu Banerjee
Induction heating method is a well known process to produce heat in a localized area on a susceptible metallic object. High frequency power, a work coil and an ancillary instrument part is the basis of induction heating. It is used in industrial and domestic areas where uniform and rapid heating is absolutely essential. As it is highly needed, in this research work, the effectiveness of induction heating will be verified by different curing methods. Firstly to initiate the asphalt concrete curing by high frequency induction heating so that the concrete become durable, electrically conductive and appropriately adjusted for induction heating, steel wire mesh / GI wire mesh is employed which is a good conductor of electricity. Now when micro cracks are likely to occur in asphalt product, the temperature of the asphalt material can be made high by induction heating of the steel wire mesh / GI wire mesh due to which the micro cracks are repaired itself and cracks are repaired by the increased temperature curing of bitumen by the physical process of diffusion and flow of the material. Consequent upon the repair, pre repair of small cracks, major cracks fail to occur protecting the road and thus ravelling of the road prevented to a great extent.
Volume: 7
Issue: 3
Page: 872-879
Publish at: 2016-09-01

A Fault Current Limiter Circuit to Improve Transient Stability in Power System

10.11591/ijpeds.v7.i3.pp769-780
Saumen Dhara , Alok Kumar Shrivastav , Pradip Kumar Sadhu , Ankur Ganguly
Short circuit current limitation in distribution system utilities can be an operational approach to improve power quality, since the estimated voltage sag amplitude during faults may be intensely reduced. The application of superconducting fault current limiter (SFCL) is projected here to limit the fault current that occurs in power system. SFCL utilizes superconductors to instantaneously decrease the unanticipated electrical surges that happen on utility distribution and power transmission networks. SFCL considerably decrease the economic burden on the utilities by reducing the wear on circuit breakers and protecting other expensive equipment. The designed SFCL model is used for determining an impedance level of SFCL according to the fault current limitation necessities of different types of the smart grid system. The representation of this paper about to see the optimum resistive value of SFCL for enhancing the transient stability of a power system. The assessment of optimal resistive value of the SFCL connected in series in a transmission line with a conductor throughout a short circuit fault is consistently determined by applying the equal-area criterion supported by power-angle curves. A Simulink based primary model is developed and additionally the simulation results for the projected model are achieved by using MATLAB.
Volume: 7
Issue: 3
Page: 769-780
Publish at: 2016-09-01

Blind Steganography in Color Images by Double Wavelet Transform and Improved Arnold Transform

10.11591/ijeecs.v3.i3.pp586-600
Mohammad Rasoul PourArian , Ali Hanani
Steganography is a method which can put data into a media without a tangible impact on the cover media. In addition, the hidden data can be extracted with minimal differences. In this paper, two-dimensional discrete wavelet transform is used for steganography in 24-bit color images. This steganography is of blind type that has no need for original images to extract the secret image. In this algorithm, by the help of a structural similarity (SSIM) and a two-dimensional correlation coefficient, it is tried to select part of sub-band cover image instead of embedding location. These sub-bands are obtained by 3-levels of applying the DWT. Also to increase the steganography resistance against cropping or insert visible watermark, two channels of color image is used simultaneously. In order to raise the security, an encryption algorithm based on Arnold transform was also added to the steganography operation.
Volume: 3
Issue: 3
Page: 586-600
Publish at: 2016-09-01

Modeling and Control of a Doubly-Fed Induction Generator for Wind Turbine-Generator Systems

10.11591/ijpeds.v7.i3.pp982-995
Mouna Lamnadi , Mourad Trihi , Badre Bossoufi , Abdelkader Boulezhar
This paper presents a vector control direct (FOC) of double fed induction generator intended to control the generated stator powers. This device is intended to be implemented in a variable-speed wind-energy conversion system connected to the grid. In order to control the active and reactive power exchanged between the machine stator and the grid, the rotor is fed by a bi-directional converter. The DFIG is controlled by standard relay controllers. Details of the control strategy and system simulation were performed using Simulink and the results are presented in this here to show the effectiveness of the proposed control strategy.
Volume: 7
Issue: 3
Page: 982-995
Publish at: 2016-09-01

Online Adaptation of Rotor Resistance based on Sliding Mode Observer with Backstepping Control of A Five-Phase Induction Motor Drives

10.11591/ijpeds.v7.i3.pp648-655
H. Echeikh , R Trabelsi , Atif Iqbal , M.F Mimouni , R Alammari
Multiphase electric drives have been developed due to numerous advantages offered by those machines when it compared with the conventional three-phase machines. Multiphase motor drives are considered for applications, where the reduction of power per phase for both motor and inverter and high reliability are required. High performance control techniques are developed for multi-phase drives. The performances of the high performance controller and flux observers may be degraded during the operation. Since the parameters of Induction Motor (IM) varies continuously due to temperature variation and heating. Thus it is significantly important that the value of rotor resistance is continuously observed online and adapted by the control algorithm in order to avoid detuning effects. The efficiency and performance of an induction motor drive system can be improved by online observation of the critical parameters, such as the rotor resistance and stator resistance. Among the parameters of IM, rotor resistance is a decisive one for flux estimation, and also the stator resistance becomes critical in the low-speed operation condition. This paper presents a new online estimation method for the rotor resistance of the IM for sliding mode observer. This method generally based on theories of variable structure and is useful in order to adjust online unknown parameters (load torque and rotor resistance). The presented non-linear compensator afford a voltage inputs on the articulation of stator current and rotor speed measurements, and engender an estimates for the unknown parameters simultaneously, the non-measurable state variables (rotor flux and derivatives of the stator current and voltage) that converge to the corresponding true values. Under the persistent excitation condition, the proposed method estimates the actual value of rotor resistance, which guarantees the exact estimation of the rotor flux. Non-linear Backstepping control and adaptive sliding mode observer of a five-phase induction motor drive is presented. The accuracy and validity of the method is verified by MATLAB simulation model.
Volume: 7
Issue: 3
Page: 648-655
Publish at: 2016-09-01

Voltage Control of Single-Phase Two Winding Self Excited Induction Generator Using SVC-MERS for Isolated System

10.11591/ijpeds.v7.i3.pp901-907
Fransisco Danang Wijaya , Hartanto Prabowo
Single-phase induction generator is very suitable to be used in the typical loads which only need a single-phase power supply with small power capacity requirement, such as diesel engine, picohydro or small wind plant. It has some advantages such as rugged, effective cost, maintenance free and require no external excitation. However, it has inductive characteristic which makes poor voltage regulation. This paper proposed a shunt reactive compensator called SVC-MERS which can provide a variable reactive power to maintain the generator voltage despite of load variations. The experiment was conducted on single-phase two winding induction generator coupled by a three-phase induction motor which serves as the prime mover. SVC-MERS and the load are connected in shunt to the main winding, while the excitation capacitor was connected to the auxiliary winding. The experimental results showed that SVC-MERS can improve voltage regulation and substantially enhanced steady state loading limit.
Volume: 7
Issue: 3
Page: 901-907
Publish at: 2016-09-01

Compensator Based Perfromance Enhancement Strategy for a SIQO Buck Converter

10.11591/ijpeds.v7.i3.pp800-815
Augusti Lindiya , S Palani , K Vijayarekha
This paper attempts to design lag and lag-lead compensators for improving the performance of a Single Inductor Quad Output (SIQO) dc-dc buck converter in terms of time domain and frequency domain specifications. It develops the state space averaged model to find the duty ratio of the desired output voltages at steady state. The exercise arrives at the transfer function model from the state space averaged model through the use of its lumped small signal equivalent circuit which allows analyzing the performance of the system in frequency and time domains. The responses are derived in the MATLAB/Simulink® using discrete components incorporating compensators of the converter. The hardware results obtained using Data Acquisition Module DT9834® interfaced to MATLAB/Simulink® and prototype model establish the performance of the compensator based converter and further emphasize its ability to minimize the ripples over a range of operating loads. 
Volume: 7
Issue: 3
Page: 800-815
Publish at: 2016-09-01

Anomalies Detection Based on the ROC Analysis using Classifiers in Tactical Cognitive Radio Systems: A survey

10.11591/ijai.v5.i3.pp105-116
Ahmed Moumena
Receiver operating characteristic (ROC) curve is an important technique for organizing classifiers and visualizing their performance in tactical systems in the presence of jamming signal. ROC curves are commonly used to evaluate the performance of classifiers for anomalies detection. This paper gives a survey of ROC analysis based on the anomaly detection using classifiers for using them in research. In recent years have been increasingly adopted in the machine learning and data mining research communities. This survey gives definitions of the anomaly detection theory and how to use one ROC curve, what a ROC curve, when we use ROC curves.
Volume: 5
Issue: 3
Page: 105-116
Publish at: 2016-09-01

Solar Photovoltaic Generators with MPPT and Battery Storage in Microgrids

10.11591/ijpeds.v7.i3.pp701-712
B V Rajanna , SVNL Lalitha , Ganta Joga Rao , S K Shrivastava
Maximum power point tracking (MPPT) of a photo voltaic system with different temperature and insolation conditions used for Micro grids can be explained in this paper. The different steps of the design of this controller are presented together with its simulation and the feasibility of control methods to be adopted for the operation of a micro grid when it becomes isolated. Normally, the micro grid operates in interconnected mode with the medium voltage network; however, scheduled or forced isolation can take place. In such conditions, the micro grid must have the ability to operate stably and autonomously. An evaluation of the need of storage devices and load to take off strategies is included in this paper. Solar photovoltaic (PV) energy has witnessed double-digit growth in the past decade. The penetration of PV systems as distributed generators in low-voltage grids has also seen significant attention. In addition, the need for higher overall grid efficiency and reliability has boosted the interest in the microgrid concept. High-efficiency PV-based microgrids require maximum power point tracking (MPPT) controllers to maximize the harvested energy due to the nonlinearity in PV module characteristics. This paper proposes an approach of coordinated and integrated control of solar PV generators with the maximum power point tracking (MPPT) control and battery storage control to provide voltage and frequency (V-f) support to an islanded microgrid. The simulation studies are carried out with the IEEE 13-bus feeder test system in grid connected and islanded microgrid modes. The MPPT of a Photovoltaic System for Micro Grid operation is successfully designed and simulated by using MATLAB/Simulink Software in this paper.
Volume: 7
Issue: 3
Page: 701-712
Publish at: 2016-09-01
1 2 3
...
1826 1827
Show 1456 of 1827

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration